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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Components of Troubled Debt Restructured Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	$ 8,997	$ 21,837
Commitments to lend to clients with outstanding loans classified as TDRs	63	135
Accruing TDRs	4,700	6,600
Non-accrual TDRs	4,300	15,200
NTM Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	2,631	2,932
Traditional Loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	6,366	18,905
Commercial | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	3,884	16,245
Commercial | SBA
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	265	266
Commercial | NTM Loans | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	0	0
Commercial | NTM Loans | SBA
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	0	0
Commercial | Traditional Loans | Commercial and industrial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	3,884	16,245
Commercial | Traditional Loans | SBA
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	265	266
Consumer | Single family residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	4,848	5,032
Consumer | Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	0	294
Consumer | NTM Loans | Single family residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	2,631	2,638
Consumer | NTM Loans | Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	0	294
Consumer | Traditional Loans | Single family residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	2,217	2,394
Consumer | Traditional Loans | Other consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans and leases	$ 0	$ 0

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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
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